Drop prefetch/REQUESTED_MESSAGE_CACHE because 99.9% not used.

Message cache needs new design due to encrypted messages.

dev/Common/Cache.js

@@ -4,7 +4,6 @@ import { isArray } from 'Common/Utils';
 let FOLDERS_CACHE = {},
 	FOLDERS_NAME_CACHE = {},
 	MESSAGE_FLAGS_CACHE = {},
-	REQUESTED_MESSAGE_CACHE = {},
 	inboxFolderName = 'INBOX';
 
 export const
@@ -15,7 +14,6 @@ export const
 		FOLDERS_CACHE = {};
 		FOLDERS_NAME_CACHE = {};
 		MESSAGE_FLAGS_CACHE = {};
-		REQUESTED_MESSAGE_CACHE = {};
 	},
 
 	/**
@@ -25,19 +23,6 @@ export const
 	 */
 	getMessageKey = (folderFullName, uid) => folderFullName + '#' + uid,
 
-	/**
-	 * @param {string} folder
-	 * @param {string} uid
-	 */
-	addRequestedMessage = (folder, uid) => REQUESTED_MESSAGE_CACHE[getMessageKey(folder, uid)] = true,
-
-	/**
-	 * @param {string} folder
-	 * @param {string} uid
-	 * @returns {boolean}
-	 */
-	hasRequestedMessage = (folder, uid) => true === REQUESTED_MESSAGE_CACHE[getMessageKey(folder, uid)],
-
 	/**
 	 * @returns {string}
 	 */

dev/Common/UtilsUser.js

@@ -1,4 +1,4 @@
-import { MessageFlagsCache, addRequestedMessage } from 'Common/Cache';
+import { MessageFlagsCache } from 'Common/Cache';
 import { Notification } from 'Common/Enums';
 import { MessageSetAction, ComposeType/*, FolderType*/ } from 'Common/EnumsUser';
 import { doc, createElement, elementById, dropdowns, dropdownVisibility } from 'Common/Globals';
@@ -290,7 +290,6 @@ populateMessageBody = (oMessage, preload) => {
 						}
 */
 						isNew || message.revivePropertiesFromJson(json);
-						addRequestedMessage(message.folder, message.uid);
 						if (messagesDom) {
 							let id = 'rl-msg-' + message.hash.replace(/[^a-zA-Z0-9]/g, ''),
 								body = elementById(id);

dev/View/User/MailBox/MessageList.js

@@ -24,9 +24,7 @@ import { i18n, initOnStartOrLangChange } from 'Common/Translator';
 
 import {
 	getFolderFromCacheList,
-	MessageFlagsCache,
-	hasRequestedMessage,
-	addRequestedMessage
+	MessageFlagsCache
 } from 'Common/Cache';
 
 import { AppUserStore } from 'Stores/User/App';
@@ -61,7 +59,6 @@ export class MailMessageList extends AbstractViewRight {
 	constructor() {
 		super();
 
-		this.bPrefetch = false;
 		this.emptySubjectValue = '';
 
 		this.iGoToUpOrDownTimeout = 0;
@@ -817,35 +814,6 @@ export class MailMessageList extends AbstractViewRight {
 		addShortcut('arrowright', 'meta', Scope.MessageView, ()=>false);
 
 		addShortcut('f', 'meta', Scope.MessageList, ()=>this.advancedSearchClick());
-
-		if (!ThemeStore.isMobile() && SettingsCapa('Prefetch')) {
-			ifvisible.idle(this.prefetchNextTick.bind(this));
-		}
-	}
-
-	prefetchNextTick() {
-		if (!this.bPrefetch && !ifvisible.now() && !this.viewModelDom.hidden) {
-			const message = MessagelistUserStore.find(
-				item => item && !hasRequestedMessage(item.folder, item.uid)
-			);
-			if (message) {
-				this.bPrefetch = true;
-
-				addRequestedMessage(message.folder, message.uid);
-
-				Remote.message(
-					iError => {
-						const next = !iError;
-						setTimeout(() => {
-							this.bPrefetch = false;
-							next && this.prefetchNextTick();
-						}, 1000);
-					},
-					message.folder,
-					message.uid
-				);
-			}
-		}
 	}
 
 	advancedSearchClick() {

snappymail/v/0.0.0/app/libraries/RainLoop/Actions.php

@@ -1165,7 +1165,6 @@ class Actions
 				'Kolab'                => false, // See Kolab plugin
 				'MessageActions'       => (bool) $oConfig->Get('capa', 'message_actions', true),
 				'OpenPGP'              => (bool) $oConfig->Get('security', 'openpgp', false),
-				'Prefetch'             => (bool) $oConfig->Get('labs', 'allow_prefetch', false),
 				'Quota'                => (bool) $oConfig->Get('capa', 'quota', true),
 				'Search'               => (bool) $oConfig->Get('capa', 'search', true),
 				'SearchAdv'            => (bool) $oConfig->Get('capa', 'search', true) && $oConfig->Get('capa', 'search_adv', true),

snappymail/v/0.0.0/app/libraries/RainLoop/Config/Application.php

@@ -337,7 +337,6 @@ Enables caching in the system'),
 			),
 
 			'labs' => array(
-				'allow_prefetch' => array(false),
 				'cache_system_data' => array(true),
 				'date_from_headers' => array(true),
 				'autocreate_system_folders' => array(false),

snappymail/v/0.0.0/app/libraries/RainLoop/Enumerations/Capa.php

@@ -6,7 +6,6 @@ class Capa
 {
 	const GNUPG = 'GnuPG';
 	const OPEN_PGP = 'OpenPGP';
-	const PREFETCH = 'Prefetch';
 	const THEMES = 'Themes';
 	const USER_BACKGROUND = 'UserBackground';
 	const SIEVE = 'Sieve';